GRAPHICAL AND WKB ANALYSIS OF NONUNIFORM BRAGG GRATINGS

被引:76
作者
POLADIAN, L
机构
[1] Optical Fibre Technology Centre, University of Sydney
来源
PHYSICAL REVIEW E | 1993年 / 48卷 / 06期
关键词
D O I
10.1103/PhysRevE.48.4758
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
A deeper insight into the relationship between the shape of a slowly varying nonuniform Bragg grating and its reflectance spectrum is obtained through a qualitative graphical analysis of the local photonic band gaps in the grating and a quantitative WKB (or phase-integral) approximation of the grating fields. Three different gratings-a linearly chirped grating, a moire grating, and a Gaussian tapered grating-are analyzed in detail to illustrate the power of the technique. The results are in excellent agreement with the exact numerical results obtained via coupled-mode analysis.
引用
收藏
页码:4758 / 4767
页数:10
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